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WO1989008209A1 - Electromagnetic single-disk brake - Google Patents

Electromagnetic single-disk brake Download PDF

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Publication number
WO1989008209A1
WO1989008209A1 PCT/EP1988/001196 EP8801196W WO8908209A1 WO 1989008209 A1 WO1989008209 A1 WO 1989008209A1 EP 8801196 W EP8801196 W EP 8801196W WO 8908209 A1 WO8908209 A1 WO 8908209A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnet
brake
disc
gap
brake according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1988/001196
Other languages
German (de)
French (fr)
Inventor
Michael Bott
Uwe Winkler
Patrice Jean Kemmel
Dieter Prause
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pfaff Haushaltsmaschinen GmbH
Original Assignee
Pfaff Haushaltsmaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pfaff Haushaltsmaschinen GmbH filed Critical Pfaff Haushaltsmaschinen GmbH
Publication of WO1989008209A1 publication Critical patent/WO1989008209A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/10—Electrical or electromagnetic drives
    • D05B69/12—Electrical or electromagnetic drives using rotary electric motors
    • D05B69/125—Arrangement of clutch-brake construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets

Definitions

  • the invention relates to an electromagnetic single-disc brake according to the preamble of claim 1.
  • Such single-disc brakes are generally known and are used as brakes in electrical devices in which rotating parts are to be braked optionally. If both parts that can be coupled due to electromagnetic effects can be rotated, the brake must be referred to as a clutch.
  • the brake disc forming the anchor is one of those
  • Brakes are usually provided with return springs, so that when the brake is inactive, i. H. in the de-energized state of the electromagnet to generate a distance between the brake disc and the opposite parts of the electromagnet, which ensures an absolute free running of the two parts and thus reduces wear.
  • the invention is therefore based on the object to provide a brake according to the preamble of claim 1, the switching noise in operation as far as possible. is avoided and secured against premature abrasion.
  • the brake disc is axially movable on the part carrying it, for example a shaft or armature hub without restoring force, so that the electromagnet does not have to overcome a restoring force when excited.
  • the disc can face the adjacent electromagnet without a noticeable air gap, whereby the gap in the yoke of the electromagnet ensures that the magnetic force caused by residual magnetism is reduced in the unexcited state of the electromagnet to such an extent that the brake disc is not pulled against the electromagnet by it.
  • this gap is sufficiently narrow that it does not noticeably reduce the magnetic force developed by it when the electromagnet is excited.
  • the brake disc In the de-energized state, the brake disc therefore rotates with a minimal air gap in relation to the electromagnet, so that it is protected against wear in this state.
  • the gap in the magnetic yoke has a width of approximately 0.1 to 0.2 mm.
  • This gap could be filled with air, but for practical implementation it is more favorable if it is filled with a film made of a material of high magnetic resistance because this simplifies assembly. This film can also reduce the penetration of dirt into the electromagnet.
  • the electromagnet is designed in the form of a ring, consisting of a ring coil which is surrounded on its inner and outer circumference by pole legs, which are covered on its side facing away from the brake disc by a yoke plate, between which and at least one of the pole legs said film is located, which is designed as a disc.
  • the two pole legs form a gap between them, which the brake disc faces.
  • a brake pad material may be contained in this gap. This magnetic construction is thus completely closed to the outside.
  • a shaft runs through the electromagnet, which carries the brake disc in a rotationally fixed but axially movable manner.
  • Fig. 1 is an exploded perspective view of an electromagnetic single disc brake for a toothed belt pinion
  • Fig. 2 is an axial section through the arrangement of FIG. 1 in the assembled state in an enlarged Presentation.
  • FIG. 1 an exploded view of a single-surface brake, consisting of an annular electromagnet (1), which in the present example is intended for mounting on a fixed part, and a rotatable brake disc (2), which is axially opposite the electromagnet (1) and which has a bore with internal toothing (3) into which the external toothing (4) of an anchor hub (5) engages, which is positively coupled to a belt sprocket (6), which in turn is mounted on a shaft (7) in a rotationally fixed manner by means of a keyway connection, which penetrates the electromagnet (1), the brake disc (2), the armature hub (5) and the pinion (6).
  • the armature hub (5) and the pinion (6) are clamped in the axial direction on the shaft (7) between a shaft collar (8) and a clamping nut (9) screwed onto the shaft.
  • the clamping nut (9) is secured by a lock nut (10).
  • the electromagnet (1) comprises a magnetic yoke with two concentric pole legs (11 and 12), between which there is an annular magnetic coil (13), and on the side facing away from the brake disc (2) a yoke plate (14), which in the present case also provides fastening means for the electromagnet (1).
  • the two pole legs (11 and 12) form an annular gap between them, in which a brake pad (15) is arranged.
  • the pole legs (11 and 12) are axially opposed by the brake disc (2), which is movable in the axial direction on the toothing of the armature hub (5).
  • Fig. 2 is between the brake disc (2) and the opposing pole legs (11 and 12) and the Brake pad (15) shown a gap that should be as small as possible to avoid hard switching noises when the brake is applied.
  • Fig. 2 shows that there is a gap between the outer pole leg (11) and the yoke plate (14), which in the present case is filled by a film disc (16) made of a material of high magnetic resistance.
  • This film disc (16) can have a thickness of, for example, 0.1 to 0.2 mm and in the present case also extends over the adjacent end face of the magnet coil (13). It has a central bore which is centered on the inner pole leg (12) on the electromagnet (1).
  • the film disc (16) thus defines a certain distance between the end face of the outer pole leg (11) and the yoke plate (14) which increases the magnetic resistance in the magnetic circuit to such an extent that in the de-energized state of the electromagnet (1) that of the residual magnetism on the brake disc (2) the force exerted cannot cause the brake disc (2) to "stick" to the pole legs (11 and 12) and the brake disc (2) is therefore free in front of the pole legs (11 and 12).
  • the increase in the magnetic resistance caused by the film disc (16) is so small that, when the electromagnet (1) is excited, its function is not impaired and its active braking force is only insignificantly reduced.
  • the film disc (16) has the further advantage that it connects the yoke plate (14) at least with the outer pole leg (11) in the manner of a seal, as a result of which a dust-tight seal of the electromagnet is achieved on its rear side, so that there no ferritic brake abrasion and can influence the magnetic resistance.
  • the diameter of the film disc (16) is preferably somewhat larger than the outer diameter of the outer pole leg (11).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

An electromagnetic device for force-locking coupling of two counterrotatable parts comprises a preferably annular electromagnet secured to one part so as to remain fixed during rotation and a brake disk facing the pole cores of the electromagnet and secured to a shaft so as to remain fixed during rotation but nevertheless axially mobile. The brake disk is held on the shaft without application of a restoring force. Located in the part of the magnetic circuit of the electromagnet occupied by the magnetic yoke is a narrow gap of given width filled with a material of high magnetic resistance, in particular a foil disk, so that in the excited state, the forces created by the residual magnetism are so small that the brake disk does not adhere to the pole cores of the electromagnet.

Description

Beschreibung description

Elektromagnetische EinscheibenbremseElectromagnetic single disc brake

Die Erfindung bezieht sich auf eine elektromagnetische Einscheibenbremse nach dem Oberbegriff des Anspruchs 1.The invention relates to an electromagnetic single-disc brake according to the preamble of claim 1.

Solche Einscheibenbremsen sind allgemein bekannt und werden in elektrischen Geräten, in denen umlaufende Teile wahlweise abgebremst werden sollen, als Bremsen verwendet. Sind beide durch elektromagnetische Wirkung kuppelbare Teile drehbar, ist die Bremse als Kupplung zu bezeichnen.Such single-disc brakes are generally known and are used as brakes in electrical devices in which rotating parts are to be braked optionally. If both parts that can be coupled due to electromagnetic effects can be rotated, the brake must be referred to as a clutch.

Die den Anker bildende Bremsscheibe ist bei solchenThe brake disc forming the anchor is one of those

Bremsen üblicherweise mit Rückstellfedern versehen, um bei inaktiver Bremse, d. h. im aberregten Zustand des Elektromagneten, einen Abstand zwischen der Bremsscheibe und den gegenüberstehenden Teilen des Elektromagneten zu erzeugen, der ein absolutes Freilaufen der beiden Teile sicherstellt und somit Verschleiß mindert.Brakes are usually provided with return springs, so that when the brake is inactive, i. H. in the de-energized state of the electromagnet to generate a distance between the brake disc and the opposite parts of the electromagnet, which ensures an absolute free running of the two parts and thus reduces wear.

Diese Rückstellfedern erzeugen natürlich einen gewissen Spalt zwischen der Bremsscheibe und den gegenüberstehenden Teilen des Elektromagneten, der mit zunehmender Abnutzung der Teile im Laufe der Zeit zunimmt, so daß die elektromagnetische Kraft des Elektromagneten unter Umständen nicht mehr ausreicht, die Bremsscheibe an den Magneten heranzuziehen. Es kommt zum Ausfall, der durch Nachstellen der Bremse beseitigt werden muß. Außerdem wird die Bremsscheibe beim Anlegen der Bremse, d. h. beim Erregen des Elektromagneten, so stark beschleunigt, daß sie mit hoher Kraft und entsprechendem, knallenden Geräusch auf den Elektromagneten oder einem daran angebrachten Bremsbelag auftrifft. Diese Geräusche sind äußerst störend.These return springs naturally create a certain gap between the brake disc and the opposing parts of the electromagnet, which increases over time with increasing wear of the parts, so that the electromagnetic force of the electromagnet may no longer be sufficient to pull the brake disc against the magnet. There is a failure, which must be remedied by adjusting the brake. In addition, the brake disc when the brake is applied, ie when the electromagnet is energized, is accelerated so much that it is subjected to high force and a corresponding popping noise Electromagnet or a brake pad attached to it. These noises are extremely annoying.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Bremse nach dem Oberbegriff des Anspruchs 1 zu schaffen, die Schaltgeräusche im Betrieb weitestgehend. vermeider und gegen vorzeitigen Abrieb gesichert ist.The invention is therefore based on the object to provide a brake according to the preamble of claim 1, the switching noise in operation as far as possible. is avoided and secured against premature abrasion.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the characterizing features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Demgemäß ist die Bremsscheibe auf dem sie tragenden Teil, beispielsweise einer Welle oder Ankernabe ohne Rückstellkraft axial beweglich gehalten, so daß der Elektromagnet bei Erregung keine Rückstellkraft überwinden muß. Die Scheibe kann dem benachbarten Elektromagneten ohne merklichen Luftspalt gegenüberstehen, wobei durch den Spalt im Joch des Elektromagneten sichergestellt ist, daß die durch Restmagnetismus hervorgerufene Magnetkraft im unerregten Zustand des Elektromagneten soweit herabgesetzt ist, daß die Bremsscheibe durch diese nicht gegen den Elektromagneten gezogen wird. Dieser Spalt ist andererseits ausreichend schmal, daß er im erregten Zustand des Elektromagneten die von ihm entwickelte Magnetkraft nicht merklich verringert.Accordingly, the brake disc is axially movable on the part carrying it, for example a shaft or armature hub without restoring force, so that the electromagnet does not have to overcome a restoring force when excited. The disc can face the adjacent electromagnet without a noticeable air gap, whereby the gap in the yoke of the electromagnet ensures that the magnetic force caused by residual magnetism is reduced in the unexcited state of the electromagnet to such an extent that the brake disc is not pulled against the electromagnet by it. On the other hand, this gap is sufficiently narrow that it does not noticeably reduce the magnetic force developed by it when the electromagnet is excited.

Im unerregten Zustand dreht sich daher die Bremsscheibe mit minimalem Luftspalt gegenüber dem Elektromagneten, so daß sie in diesem Zustand gegen Verschleiß geschützt ist.In the de-energized state, the brake disc therefore rotates with a minimal air gap in relation to the electromagnet, so that it is protected against wear in this state.

In der Praxis reicht es beispielsweise für eine Bremse, die eine Bremskraft von beispielsweise 7 Ncm hat, daß der Spalt im Magnetjoch eine Breite von etwa 0,1 bis 0,2 mm aufweist. Dieser Spalt konnte lufterfüllt sein, für die praktische Realisierung ist es jedoch günstiger, wenn er von einer Folie aus einem Material hohen magnetischen Widerstandes ausgefüllt ist, weil dadurch die Montage vereinfacht wird. Auch kann diese Folie das Eindringen von Schmutz in den Elektromagneten verringern.In practice, it is sufficient, for example, for a brake that has a braking force of, for example, 7 Ncm the gap in the magnetic yoke has a width of approximately 0.1 to 0.2 mm. This gap could be filled with air, but for practical implementation it is more favorable if it is filled with a film made of a material of high magnetic resistance because this simplifies assembly. This film can also reduce the penetration of dirt into the electromagnet.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Elektromagnet ringförmig ausgeführt, bestehend aus einer Ringspule, die an ihrem inneren und äußeren Umfang von Polschenkeln umgeben ist, die auf ihrer der Bremsscheibe abgewandten Seite von einer Jochplatte abgedeckt sind, zwischen der und wenigstens einem der Polschenkel sich die genannte Folie befindet, die als Scheibe ausgeführt ist. Auf der gegenüberliegenden Seite bilden die beiden Polschenkel einen Spalt zwischen sich aus, dem die Bremsscheibe gegenübersteht. In diesem Spalt kann ein Bremsbelagmaterial enthalten sein. Diese Magnetkonstruktion ist somit nach außen völlig abgeschlossen. Durch den Elektromagneten verläuft eine Welle, die die Bremsscheibe drehfest, jedoch axial beweglich trägt.According to an advantageous embodiment of the invention, the electromagnet is designed in the form of a ring, consisting of a ring coil which is surrounded on its inner and outer circumference by pole legs, which are covered on its side facing away from the brake disc by a yoke plate, between which and at least one of the pole legs said film is located, which is designed as a disc. On the opposite side, the two pole legs form a gap between them, which the brake disc faces. A brake pad material may be contained in this gap. This magnetic construction is thus completely closed to the outside. A shaft runs through the electromagnet, which carries the brake disc in a rotationally fixed but axially movable manner.

Die Erfindung wird nachfolgend unter Bezugnahme auf ein in den Zeichnungen dargestelltes Ausführungsbeispiel näher erläutert. Es zeigt:The invention is explained in more detail below with reference to an embodiment shown in the drawings. It shows:

Fig. 1 eine perspektivische Explosionsdarstellung einer elektromagnetischen Einscheibenbremse für ein Zahnriemenritzel, undFig. 1 is an exploded perspective view of an electromagnetic single disc brake for a toothed belt pinion, and

Fig. 2 einen Axialschnitt durch die Anordnung nach Fig. 1 im montierten Zustand in vergrößerter Darstellung.Fig. 2 is an axial section through the arrangement of FIG. 1 in the assembled state in an enlarged Presentation.

Man erkennt in Fig. 1 in Explosionsdarstellung eine Einflächenbremse, bestehend aus einem ringförmigen Elektromagneten (1), der im vorliegenden Beispiel zur Montage an einem feststehenden Teil bestimmt ist, und einer drehbaren Bremsscheibe (2), die dem Elektromagneten (1) axial gegenübersteht und die eine Bohrung mit Innenverzahnung (3) aufweist, in die die Außenverzahnung (4) einer Ankernabe (5) eingreift, die formschlüssig mit einem Riemenzahnritzel (6) gekuppelt ist, das seinerseits mittels einer Keilnutverbindug auf einer Welle (7) drehfest angebracht ist, die den Elektromagneten (1), die Bremsscheibe (2), die Ankernabe (5) und das Zahnritzel (6) durchdringt. Die Ankernabe (5) und das Zahnritzel (6) sind auf der Welle (7) zwischen einem Wellenbund (8) und einer auf die Welle aufgeschraubten Spannmutter (9) in axialer Richtung verspannt. Die Spannmutter (9) ist durch eine Kontermutter (10) gesichert.One can see in Fig. 1 an exploded view of a single-surface brake, consisting of an annular electromagnet (1), which in the present example is intended for mounting on a fixed part, and a rotatable brake disc (2), which is axially opposite the electromagnet (1) and which has a bore with internal toothing (3) into which the external toothing (4) of an anchor hub (5) engages, which is positively coupled to a belt sprocket (6), which in turn is mounted on a shaft (7) in a rotationally fixed manner by means of a keyway connection, which penetrates the electromagnet (1), the brake disc (2), the armature hub (5) and the pinion (6). The armature hub (5) and the pinion (6) are clamped in the axial direction on the shaft (7) between a shaft collar (8) and a clamping nut (9) screwed onto the shaft. The clamping nut (9) is secured by a lock nut (10).

Der Elektromagnet (1) umfaßt ein Magnetjoch mit zwei konzentrischen Polschenkeln (11 und 12), zwischen denen sich eine ringförmige Magnetspule (13) befindet, und auf der der Bremsscheibe (2) abgewandten Seite eine Jochplatte (14), die vorliegend zugleich Befestigungseinrichtung für den Elektromagneten (1) ist. Auf der der Bremsscheibe (2) zugewandten Seite bilden die beiden Polschenkel (11 und 12) einen ringförmigen Spalt zwischen sich aus, in welchem ein Bremsbelag (15) angeordnet ist. Den Polschenkeln (11 und 12) steht axial die Bremsscheibe (2) gegenüber, die auf der Verzahnung der Ankernabe (5) in axialer Richtung beweglich ist. In Fig. 2 ist zwischen der Bremsscheibe (2) und den ihr gegenüberstehenden Polschenkeln (11 und 12) und dem Bremsbelag (15) ein Spalt dargestellt, der möglichst klein sein sollte, um harte Schaltgeräusche beim Betätigen der Bremse zu vermeiden.The electromagnet (1) comprises a magnetic yoke with two concentric pole legs (11 and 12), between which there is an annular magnetic coil (13), and on the side facing away from the brake disc (2) a yoke plate (14), which in the present case also provides fastening means for the electromagnet (1). On the side facing the brake disc (2), the two pole legs (11 and 12) form an annular gap between them, in which a brake pad (15) is arranged. The pole legs (11 and 12) are axially opposed by the brake disc (2), which is movable in the axial direction on the toothing of the armature hub (5). In Fig. 2 is between the brake disc (2) and the opposing pole legs (11 and 12) and the Brake pad (15) shown a gap that should be as small as possible to avoid hard switching noises when the brake is applied.

Fig. 2 zeigt, daß sich zwischen dem äußeren Polschenkel (11) und der Jochplatte (14) ein Spalt befindet, der vorliegend von einer Folienscheibe (16) ausgefüllt ist, die aus einem Material hohen magnetischen Widerstandes besteht. Diese Folienscheibe (16) kann eine Dicke von beispielsweise 0,1 bis 0,2 mm haben und erstreckt sich vorliegend auch über die benachbarte Stirnseite der Magnetspule (13). Sie weist eine Mittenbohrung auf, die an dem inneren Polschenkel (12) an dem Elektromagneten (1) zentriert ist.Fig. 2 shows that there is a gap between the outer pole leg (11) and the yoke plate (14), which in the present case is filled by a film disc (16) made of a material of high magnetic resistance. This film disc (16) can have a thickness of, for example, 0.1 to 0.2 mm and in the present case also extends over the adjacent end face of the magnet coil (13). It has a central bore which is centered on the inner pole leg (12) on the electromagnet (1).

Die Folienscheibe (16) definiert somit einen bestimmten Abstand zwischen der Stirnseite des äußeren Polschenkels (11) und der Jochplatte (14) der den magnetischen Widerstand im magnetischen Kreis soweit erhöht, daß im aberregten Zustand des Elektromagneten (1) die vom Restmagnetismus auf die Bremsscheibe (2) ausgeübte Kraft kein "Kleben" der Bremsscheibe (2) an den Polschenkeln (11 und 12) hervorrufen kann und die Bremsscheibe (2) daher frei vor den Polschenkeln (11 und 12) steht. Andererseits aber ist die durch die Folienscheibe (16) hervorgerufene Erhöhung des magnetischen Widerstandes so gering, daß im erregten Zustand des Elektromagneten (1) dessen Funktion nicht beeinträchtigt und seine aktive Bremskraft nur unwesentlich vermindert wird.The film disc (16) thus defines a certain distance between the end face of the outer pole leg (11) and the yoke plate (14) which increases the magnetic resistance in the magnetic circuit to such an extent that in the de-energized state of the electromagnet (1) that of the residual magnetism on the brake disc (2) the force exerted cannot cause the brake disc (2) to "stick" to the pole legs (11 and 12) and the brake disc (2) is therefore free in front of the pole legs (11 and 12). On the other hand, however, the increase in the magnetic resistance caused by the film disc (16) is so small that, when the electromagnet (1) is excited, its function is not impaired and its active braking force is only insignificantly reduced.

Die Folienscheibe (16) hat weiterhin den Vorteil, daß sie die Jochplatte (14) wenigstens mit dem äußeren Polschenkel (11) nach Art einer Dichtung verbindet, wodurch ein staubdichter Abschluß des Elektromagneten auf seiner Rückseite erreicht wird, so daß sich dort kein ferritischer Bremsabrieb absetzen und den magnetischen Widerstand beeinflussen kann. Dazu ist vorzugsweise der Durchmesser der Folienscheibe (16) etwas größer als der Außendurchmesser des äußeren Polschenkels (11). The film disc (16) has the further advantage that it connects the yoke plate (14) at least with the outer pole leg (11) in the manner of a seal, as a result of which a dust-tight seal of the electromagnet is achieved on its rear side, so that there no ferritic brake abrasion and can influence the magnetic resistance. For this purpose, the diameter of the film disc (16) is preferably somewhat larger than the outer diameter of the outer pole leg (11).

Claims

Patentansprüche Claims 1. Elektromagnetische Einscheibenbremse zum kraftschlüssigen Kuppeln zweier gegeneinander drehbarer Teile, enthaltend einen mit dem einem Teil drehfest verbundenen Elektromagneten mit einem Joch mit zwei beidseitig einer Spule angeordneten Polschenkeln, denen auf einer Seite eine mit dem anderen Teil drehfest, jedoch axial beweglich verbundene, einen Anker für den Elektromagneten bildende Bremsscheibe gegenübersteht, und mit einer Jochplatte auf der der Bremsscheibe abgewandten Seite der Polschenkel im magnetischen Kreis des Elektromagneten, d a d u r c h g e k e n n z e i c h n e t , daß die Bremsscheibε1.Electromagnetic single-disc brake for the frictional coupling of two mutually rotatable parts, comprising an electromagnet which is connected to one part in a rotationally fixed manner and has a yoke with two pole legs arranged on both sides of a coil and on one side of which an armature is connected in a rotationally fixed but axially movable manner to the other part stands for the electromagnet forming brake disc, and with a yoke plate on the side facing away from the brake disc of the pole legs in the magnetic circuit of the electromagnet, characterized in that the Bremsscheibε (2) rückstellkraftlos auf dem sie tragenden Teil (5) gehalten ist, daß zwischen wenigstens einem der Polschenkel (11, 12) und der Jochplatte (14) ein schmaler Spalt ausgebildet ist, in welchem sich ein Material (16) hohen magnetischen Widerstandes befindet.(2) is held without restoring force on the part (5) carrying it, that a narrow gap is formed between at least one of the pole legs (11, 12) and the yoke plate (14), in which there is a material (16) of high magnetic resistance . 2. Bremse nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß das Material Luft ist.2. Brake according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the material is air. 3. Bremse nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Spalt von einer Folienscheibe (16) ausgefüllt ist.3. Brake according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the gap is filled by a film disc (16). Bremse nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß der Spalt eine Breite bzw. die Folienscheibe (16) eine Dicke von 0,1 bis 0,2 mm aufweisen. Brake according to one of the preceding claims, characterized in that the gap has a width and the film disc (16) has a thickness of 0.1 to 0.2 mm. 5. Bremse nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Magnetspule (13) eine Ringspule ist, die zwischen zwei zylindrischen Polschenkeln (11, 12) angeordnet ist, und die Jochplatte (14) kreisförmig ist und eine Bohrung aufweist, die von einer die Bremsscheibe (2) tragenden Welle (7) durchdrungen ist.5. Brake according to one of the preceding claims, characterized in that the magnet coil (13) is a ring coil which is arranged between two cylindrical pole legs (11, 12), and the yoke plate (14) is circular and has a bore which is one the brake disc (2) carrying shaft (7) is penetrated. 6. Bremse nach den Ansprüchen 3 und 5, d a d u r c h g e k e n n z e i c h n e t , daß die Folienscneibe (16) einen größeren Außendurchmesser hat, als der äußere Polschenkel (11) des Elektromagneten (1). 6. Brake according to claims 3 and 5, d a d u r c h g e k e n n z e i c h n e t that the film disc (16) has a larger outer diameter than the outer pole leg (11) of the electromagnet (1).
PCT/EP1988/001196 1988-02-24 1988-12-22 Electromagnetic single-disk brake Ceased WO1989008209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3805705.0 1988-02-24
DE19883805705 DE3805705C1 (en) 1988-02-24 1988-02-24

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WO1989008209A1 true WO1989008209A1 (en) 1989-09-08

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WO (1) WO1989008209A1 (en)

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CN115807823A (en) * 2022-11-16 2023-03-17 台州赫兹电气有限公司 Electromagnetic power-on brake

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EP0786852B1 (en) * 1996-01-24 2000-09-20 Siemens Aktiengesellschaft Electric drive
DE10355719B4 (en) * 2003-11-28 2006-06-01 Bühler Motor GmbH Electromagnetic brake
DE102008054636A1 (en) * 2008-12-15 2010-06-17 Zf Friedrichshafen Ag Electromagnetically actuated brake

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US2695687A (en) * 1952-07-02 1954-11-30 Warner Electric Brake & Clutch Magnetic friction device with replaceable friction face
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EP0146783A2 (en) * 1983-12-21 1985-07-03 Westinghouse Electric Corporation Improved lightweight electric robotic actuator
US4718523A (en) * 1985-02-20 1988-01-12 Zahnradfabrik Friedrichshafen Ag Magnet body for engine brakes

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US2860403A (en) * 1953-06-30 1958-11-18 Warner Electric Brake & Clutch Method of making a pole piece unit for magnets
AT198572B (en) * 1955-09-05 1958-07-10 Anton Ryba Electromagnetic or electromagnetically operated clutch without slip rings
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US2650682A (en) * 1949-01-19 1953-09-01 Warner Electric Brake & Clutch Electromagnetic friction device
US2695687A (en) * 1952-07-02 1954-11-30 Warner Electric Brake & Clutch Magnetic friction device with replaceable friction face
DE2103448A1 (en) * 1971-01-26 1972-08-17 Dayton Steel Foundry Co Magnet assembly for an electric brake and method of manufacturing the same
EP0146783A2 (en) * 1983-12-21 1985-07-03 Westinghouse Electric Corporation Improved lightweight electric robotic actuator
US4718523A (en) * 1985-02-20 1988-01-12 Zahnradfabrik Friedrichshafen Ag Magnet body for engine brakes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115807823A (en) * 2022-11-16 2023-03-17 台州赫兹电气有限公司 Electromagnetic power-on brake

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